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- #!/usr/bin/env python
- '''
- Copyright (C) 2006 Nathan Hurst
- Copyright (C) 2005 Aaron Spike, aaron@ekips.org
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- '''
- import inkex, simplestyle, simplepath,sys,cubicsuperpath, bezmisc
-
- def numsegs(csp):
- return sum([len(p)-1 for p in csp])
- def interpcoord(v1,v2,p):
- return v1+((v2-v1)*p)
- def interppoints(p1,p2,p):
- return [interpcoord(p1[0],p2[0],p),interpcoord(p1[1],p2[1],p)]
- def pointdistance((x1,y1),(x2,y2)):
- return math.sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2))
- def bezlenapprx(sp1, sp2):
- return pointdistance(sp1[1], sp1[2]) + pointdistance(sp1[2], sp2[0]) + pointdistance(sp2[0], sp2[1])
- def tpoint((x1,y1), (x2,y2), t = 0.5):
- return [x1+t*(x2-x1),y1+t*(y2-y1)]
- def cspbezsplit(sp1, sp2, t = 0.5):
- m1=tpoint(sp1[1],sp1[2],t)
- m2=tpoint(sp1[2],sp2[0],t)
- m3=tpoint(sp2[0],sp2[1],t)
- m4=tpoint(m1,m2,t)
- m5=tpoint(m2,m3,t)
- m=tpoint(m4,m5,t)
- return [[sp1[0][:],sp1[1][:],m1], [m4,m,m5], [m3,sp2[1][:],sp2[2][:]]]
- def cspbezsplitatlength(sp1, sp2, l = 0.5, tolerance = 0.001):
- bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
- t = bezmisc.beziertatlength(bez, l, tolerance)
- return cspbezsplit(sp1, sp2, t)
- def cspseglength(sp1,sp2, tolerance = 0.001):
- bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
- return bezmisc.bezierlength(bez, tolerance)
- def csplength(csp):
- total = 0
- lengths = []
- for sp in csp:
- lengths.append([])
- for i in xrange(1,len(sp)):
- l = cspseglength(sp[i-1],sp[i])
- lengths[-1].append(l)
- total += l
- return lengths, total
-
- class Length(inkex.Effect):
- def __init__(self):
- inkex.Effect.__init__(self)
- self.OptionParser.add_option("-f", "--fontsize",
- action="store", type="string",
- dest="fontsize", default="20",
- help="Size of node label numbers")
- self.OptionParser.add_option("-o", "--offset",
- action="store", type="string",
- dest="offset", default="-4",
- help="The distance above the curve")
- def effect(self):
- for id, node in self.selected.iteritems():
- if node.tagName == 'path':
- self.group = self.document.createElement('svg:g')
- node.parentNode.appendChild(self.group)
-
- try:
- t = node.attributes.getNamedItem('transform').value
- self.group.setAttribute('transform', t)
- except AttributeError:
- pass
-
- a =[]
- p = cubicsuperpath.parsePath(node.attributes.getNamedItem('d').value)
- num = 1
- slengths, stotal = csplength(p)
- self.addTextOnPath(self.group,0, 0,str(stotal), id, self.options.offset)
-
-
- def addTextOnPath(self,node,x,y,text, id,dy=0):
- new = self.document.createElement('svg:text')
- tp = self.document.createElement('svg:textPath')
- s = {'font-size': self.options.fontsize, 'fill-opacity': '1.0', 'stroke': 'none',
- 'font-weight': 'normal', 'font-style': 'normal', 'fill': '#000000'}
- new.setAttribute('style', simplestyle.formatStyle(s))
- new.setAttribute('x', str(x))
- new.setAttribute('y', str(y))
- tp.setAttributeNS('http://www.w3.org/1999/xlink','xlink:href', '#'+id)
- tp.setAttribute('startOffset', "50%")
- #tp.setAttribute('dy', dy) # dubious merit
- new.appendChild(tp)
- tp.appendChild(self.document.createTextNode(str(text)))
- node.appendChild(new)
-
- e = Length()
- e.affect()
-